Oil-free compressor

Modern high-speed oil-free screw compressors adopt asymmetric screw profiles. This layout can reduce internal air leakage, thereby significantly improving energy efficiency.

External gears are usually used to synchronize the position of the reversing rotor. The rotors will not come into contact with each other or the compressor housing, and there is no need for lubrication inside the compressor chamber. Therefore, compressed air is completely oil-free.

Oil-free screw compressors limit the built-in pressure ratio by restricting the temperature difference between the intake and exhaust ports. Therefore, frequent multi-stage compression and inter-stage cooling are required to achieve higher pressure.